Unikor MXVOLTA User manual

UNIKOR BATTERY CO.,LTD.
www.ukbkorea.com
MXVOLTA BATTERY
TECHNICAL &
HANDLING
MANUAL

CONTENTS
1. WHAT IS MXVOLTA BATTERY ----------------------------
2. CHARACTERISTICS
2.1 Oxygen recombination reaction -----------------------
2.2 Prevents generation of hydrogen gas from negative pole
2.3 Prevention of gas generation by adjustment of charging
voltage -----------------------------------------
2.4 Principle of preventing liquid leakage -------------------
2.5 Principle of self-electric discharge ---------------------
3. BEFORE USING
3.1 Unloading and checking -----------------------------
3.2 Installation and connection ---------------------------
3.3 Operational test and recharge -------------------------
4. DAILY INSPECTION AND SERVICING
4.1 Treatment ----------------------------------------
4.2 Discharge ----------------------------------------
4.3 Charge ------------------------------------------
A. MONTHLY CHEKING -----------------------------------
B. 6MONTHLY CHECKING ---------------------------------
C. CHECKING ANNUALLY ---------------------------------
D. SAFETY OF HANDLING --------------------------------
REFERENCE GUIDE
*MXVOLTA battery discharge performance data -----------------
*Storage and manage MXVOLTA batteries ---------------------
*General charge range --------------------------------
*List of material for MXVOLTA batteries -----------------------
P. 3
P. 3
P. 4
P. 4
P. 5
P. 5
P. 7
P. 7
P. 7
P. 8
P. 8
P. 9
P.11
P.11
P.12
P.12
P.15
P.20
P.21
P.22

1. WHAT IS MXVOLTA BATTERY ?
MXVOLTA battery is a kind of sealed batteries with maintenance free.
Generally, it still needs to add pure water regularly in order to keep a battery efficiency. Even
though the capacity of battery having been reduced due to self discharge, MXVOLTA battery
has a circulation system to re-fill in its function automatically and will not get any bad
influence in spite of using a long period of time.
As it is, no need to add pure water for MXVOLTA battery because we made MXVOLTA battery
minimized to generate gas such as H2, O2 in the battery, which are changed into water
automatically.
2. CHARACTERISTICS OF SEALED BATTERY
2.1 Oxygen recombination reaction.
It is to solve the problems of the gas generated in charging the sealed lead acid battery,
incidental acid mist, liquid leakage and refill water and its theory is as follows:
Flooded Recombination
Reaction Formula

① Oxygen is produced in the positive plate in overcharge.
H2O→2H+ + 1/2 O2 + 2e
② The oxygen is diffused to the negative plate thorough the separator.
③ The oxygen combination with lead in the negative plate
Pb + 1/2O2 → PbO
④ The oxidized lead in the negative plate makes water by bonding with sulphuric acid for
a certain amount of lead to be in the discharged condition.
PbO + H2SO4 → PbSO4 + H2O
⑤ The discharged lead is to be in the new charged condition electrically and chemically to
form a complete cycle.
PbSO4 + 2H+ + 2e → Pb + H2SO4
Offsetting the right and the left, it become the original condition. That is, water
disappeared in the 十pole, is produced in 一pole.
For this, the generation of hydrogen gas in 一pole should be controled. It is possible by
reducing the hydrogen generation voltage(hydrogen overvoltage), which is possible by using
the calcium alloy as the existing antimony alloy cannot perform it.
2.2 Prevents generation of hydrogen gas from negative pole
The existing lead-antimony battery generates much hydrogen from negative pole when
charging it and this is due to less excessive voltage by generation of hydrogen on alloy plate
of lead and antimony. When charging VRLA battery the over voltage of hydrogen generating
was largely reduced by use of alloy grid of lead & calcium instead of alloy of lead &
antimony and with this the generation of hydrogen could be largely reduced.
2.3 Prevention of gas generation by adjustment of charging voltage.
To restrain or prevent from gas generation by causing not to be enhanced to the gas
generating point by charging voltage by setting forth ceiling of charging voltage of VRLA
battery. The ceiling voltage of charging VRLA battery is 2.46V/Cell (maximum 2.50V/Cell)
and prevent from gas generation so that charging voltage of any more may not be enhanced
and that takes in-charge of decisive role to enable this is the grid used lead & calcium.
The existing lead antimony battery generates more gas of 5-8 times than the VRLA battery
by charging voltage of 2.46V/Cell. In case VRLA battery extremely small amount of gas
generates out of charging voltage of 2.50V/Cell however, gas is not emitted outside of
battery because of this reduces to water again through gas recombination reacting process.

2.4 Principle of preventing liquid leakage
a. Complete sealed structure
VRLA battery is structurally completely airtight under the normal atmosphere. Especially,
vent hole is mechanically tight by valve and the safety valve was mounted with pressure
adjusting function if excessive pressure is filled inside of the battery taking into account of
safety.
b. Free move prevention structure of electrolyte
The electrolyte inside of battery is completely absorbed by glass fiber mat or gel which
absorption of liquid is very good and cannot freely move within the battery. Since therefore,
there is no worry about leakage of liquid as there is no electrolyte freely move even if the
battery is laid down or upside down.
2.5 Principle of self-electric discharge
The self-electric discharge phenomenon of lead-acid battery is by interaction between
active material of negative pole and electrolyte and the element incurs self-electric
discharge are largely classified into two(2) sorts as follows:
(a) Constituents consist electrolyte (hydrogen ion in sulfuric acid)
(b) Impure substances contained in electrolyte
Out of the two sorts above a is unremovable element but (b) is removable but (a) that is to
say the electrolyte itself cannot be eliminated and so, the electric discharge phenomenon by
lead battery cannot completely be restrained. However, electric discharge volume may be
reduced. VRLA battery has very small electric discharge volume than the existing lead
antimony battery and this is because of use of alloy of lead & calcium in lieu of alloy of lead
& antimony as the grid material. The plate alloyed by lead & calcium has very big resistance
against electric discharge. On the alloy grid surface of lead & calcium the sponge lead
which is negative pole active material is not easily discharged electricity since hydrogen is
difficult to be generated (high hydrogen over voltage)
For your information the electric discharge principle by hydrogen ion in electrolyte is as
follows:
(-) pole - hydrogen ion in electrolyte
2H+ + 2e ---→ H2(gas) ------------------------- (1)
(-) pole - lead which is active material
Pb + H2SO4 --→ PbSO4 + 2H+ + Ze -------------- (2)
To sum up (1) reaction & (2) reaction
Pb + H2SO4 --→ PbSO4 + H2 ↑
(charged condition) (discharge condition)
3. BEFORE USING
Please read following specification before using.
When we release the battery to the users, the battery keep initial charged state which can be
generated of flammable gas. Don't short each connection before sufficient ventilation of
Installed places and just keep it away from fire in order to prevent dangerous factors.